Siphon water-closet.



A. COCHRAN.

SIPHON WATER GLOSBT.

APPLICATION FILED APR. 13. 1911. 1,067,096, Patented July 8, 1913.

COLUMBIA IIb-ANDURAPM co..wA5mNcroN, DA C.

rrEV srarns rn'rENr onirica:

darmrniw COCHRAN, or Trinitron NEW JERSEY, nssreNon 'ro COCHRAN, DnUeAN a Co., 0E TEENTON, NEW JERSEY, E CoEroE-ArioN or NEW JERSEY.

SIPIION WATER-CLOSET.

Specification of Letters Patent.

PatclltedJuly 8, 1913.

,Application filed April 13, 1911. Serial No. 620,937.

To all whom/15 may concern:

Be it known -that I, ANDREW COCHRAN, a citizen of the United States, and a resident ,of Trenton, Mercer county, New Jersey, `have invented certain Improvements in Siphon lVater-Closets, of which the following is a specification.

My invention relates :to water closet bowls designed to be emptied by siphonic action; and the object of my invention is to provide an improved form ot ilus-hing discharge or outlet for water at the rear wall of the bowl, designed more particularly for use with what `are lmown as reverse .trap closets; that is to say, those having the trap and Siphon .discharge at the rear instead of the front of the bowl. It is well known that such .closets require more water or greater force to effect liu'shing of the same, for .the reason that the .discharge of the flushing water to the bowl cannot be directed to the ascending leg of the siphon passage, but must taire a rearward movement around the web forming the rear wall .of the bowl and the top wall ot the ascending leg of the siphon and normally dipping into the water in the bowl to form the desired seal. Diiliculty therefore has been experienced in the use ot closets Aof this type when attempting to lush them with water from a low-.down tank; it being substantially impossible to get a satisfactory liush under this slight head of water.

In my Patent No. 934,422, I have described a .construction of bowl in which the water discharge thereto is divided, subst-antially hall2 of the flushing water passing to the rim which is provided with outlets .entirely around the same, while the balance passes to a discharge outlet opening into the bowl at the rear of the Same; the port of such out-let opening substantially iush with the surface of the bowl vand directing to the bowl a large volume of water concentrated at one point and assisting materially in effecting the primary discharge of a portion of the .contents ot the bowl suiticient to ellect the desired choke Ior fill of the descending leg of the siphon, cutting oit the air whereby a vacuum is produced andy siphonie action induced. In the patented structure the siphon passages are at the front of the bowl. I have discovered that such arrangement of discharge may be employed with highly advantageous and satisfactory results in a. reverse trap closet, and that by concentrating a large proportion .oil the main supply for passage through an outlet at the rear of the bowl, it willproduce a forceful discharge of the contents ol the `bowl and :quickly iill fthe discharge leg of the Siphon, inducing siphonic action `rapidly, and very materially improving the op# eration of said reverse 4trap closets.

The principal `object of my invention is to produce a strong stream ot' water for the initial :flow or .discharge through the down leg of the Siphon where, meeting obstructions, it will film across said passage and insure the desired siphonic action.

A further feature .olf my invention the enlarged chamber' .at the upper part ot the ascending and descending legs of the Siphon; the bowl having bulging projections forming enlarged internal spaces which are partly divided by a median rib, while a further ieature of my invention is the placing of the discharge outlet from the descending leg `oi the siphon in such position as to permit .of a .closer roughing in wli-en'the `closet is set up for use.

My invention may embodied in various types of reverse trap closets, ,and in the accompanying drawings I have shown several forms embodying my invention, in which:

Figure 1, is one construction of Siphon closet bowl in which my invent-ion may be embodied; Fig. 2, is a sectional plan view on the line a-a, Fig. li; Fig. 3, is a sectional view on .the line .ZJ-b, Fig. l, and Fig. ll, is a sectional view .of the same character as Fig. l, showing a moditled arrangement embodying my invention.

In flushing closets of this type, I have discovered that etliciency in action is materially enhanced by the delivery to the bowl ot the flushing water under considerable head or torce; that is to say, the reverse passage in the bowl requiring as it does the change the movement .of the water toward the rear instead of toward the front, tends to cause the bowl to till up without .causing a sutil- `ciently heavy tlow over the weir or dam between the ascending and descending legs of the Siphon passage as to insure proper iilling of the discharge leg with Sullicient water to produce a partial vacuum and induce siphonic action. By dividing the flow in the manner in which I have done, however, and providing for the discharge of a considerable volume of water directly at the rear of the bowl, I am able to carry over very quickly the desired amountof water to induce siphonic action.

1 represents the bowl; 2 the flushing rim; 3 the ascending leg of the siphon passage; 4 the descending leg; 5 the weir between the passages, and 6 the outlet from the descending leg. It will be noted in all instances that said outlet is smaller in area than the lower portion of the descending leg, and such condition produces a choking action which facilitates the siphonic discharge.

At the rear of the bowl, an inlet for the delivery of flushing water directly is provided, indicated at 7, and the front rear wall of the bowl opposite this inlet is arranged to divide the stream so that part of the saine will go to the flushing rim 2, while the balance will enter the passage 8 opening into the bo-wl through the rear wall of the same with its outlet flush with the surface of such wall. By this means I am able to co-ncentrate considerable force through this discharge passage which will have the effect of raising the contents of the bowl into the ascending leg of the siphon quickly and with suflicient force to provide the desired choke at the discharge outlet to insure siphonic action.

The descending leg of the siphon passage has a series of zones or spaces between the weir 5 and the discharge outlet 6 which will be more fully described hereinafter. The width of the ascending leg in one plane, for instance the plane of the section shown in Fig. 1, is approximately three inches, while in the plane substantially at right angles to this, the width is approximately five inches, and this width continues to the junction with the descending leg so that an enlarged chamber 9 is presented at the top of said descending leg. This chamber is provided with a. pair of enlargements 10 formed in the rear wall of the bowl, with a depressed central portion 11; the inner surface of said enlargements being continuations of the curved wall at the top of the chamber leading from the upper wall of the ascending leg of the siphon.

Wit-hin the descending leg or passage of the siphon a zig-zag channel is provided. To this end the rear wall of the struct-ure is provided with a ledge or shelf 12 substantially opposite a bend 13 in the bore of said descending leg, and from said shelf the passage, with paralleling walls 14 and 15, descends at a slight angle pointed rearwardly to a bottom shelf 16 in said descending leg, which shelf is disposed rearwardly of the discharge outlet 6, while the forward wall of the said outlet is in line lwith a curved wall 17 of said channel or passage extending to andrjoining the diagonally disposed wall 15 at the point 18. It will be seen, therefore, that the initial flow of water over the weir 5 will strike the shelf 12 and falling on the same will be deflected across the bore of the passage of said descending leg, cutting ofi the air, producing a partial vacuum and inducing siphonic action. The presence of the enlarged space at the top of the ascending leg gives space for a large volume of air, and consequent-ly when the discharge from the bowl nears its end, the force of the flow will slow down, breaking the siphon and insuring sufficient water within the bowl as an after fill to make the desired seal, the height of which is goerned by the weir 5.

In Fig. 4, I have shown a modied construction of the descending leg of the siphon in which I form an enlarged chamber in the lower part of the same from which the discharge outlet leads. The wall opposite the ledge or shelf 12a is curved as indicated at 20 and a projection 21 is provided substantially midway bet'ween the weir 5 and the bottom wall of the descending leg of the siphon which has a bottom shelf 16a to the rear of said discharge outlet. Toward the front of said discharge outlet, the wall is curved as indicated at 22, while the rear wall of said descending leg below the ledge or shelf 12a is also curved as indicated at 23. The water in fiowing over the weir strikes the shelf or ledge 12a and is deflected to the curved wall 20 where, striking the projection 21, it will be shot in the reverse direction and strike the bottom shelf 16a. In this Zig-zag course air will be cut off, creating a partial vacuum and inducing the desired siphonic action.

It will be observed upon reference to Figs. 1 and 4 of the drawings that I provide a construction of bowl in which the discharge outlet 6 is disposed well toward the rear of the bowl, so that closet-s made in accordance with my invention permit of closer roughing in when set up for use; the structure shown in Fig. 4, roughing in a little closer than that shown in Fig. 1.

I claim:

1. A water closet bowl having a siphon conduit comprising intake and discharge legs, the upper part of the discharge leg being enlarged to provide a chamber for the presence of air and having a cent-ral projecting portion for dividing the stream, said discharge leg being contracted below the chamber at a point substantially opposite the meeting point of the divided body of water.

2. A water closet bowl having a siphon conduit comprising intake and discharge legs, the upper portion of the discharge leg being enlarged to provide a chamber for the presence of air and having a central proname to this specification in the presence of jecting portion for dividing the stream, said two subscribing Witnesses. discharge leg also having a flat shelf just below the dam at the top of the intake leg ANDREXV COCHRAN 5 and receiving the impact of the Water dis- Witnesses:

charged therefrom. MALCOLM G. OLIPHANT,

In testimony whereof, I have signed my MURRAY C. BOYER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

